Food mixer



FIG. 1 is a top front left side perspective view of a food mixer showing my new design;

FIG. 2 is a top rear right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof; and

FIG. 5 is a front elevational view thereof.

The bottom plan view is plain and unornamented. 

The ornamental design for a food mixer, substantially as shown. 